Error Code List - Mitsubishi MELSEC Q Series Programming Manual

12.1

Error Code List

The CPU module uses the self diagnostics function to display error information (on the LED) and
stores the information into the special relay SM and special register SD, when an error occurs in
the following situations:
• When the Progammable Controller is powered ON.
• When the CPU module is switched from STOP to RUN.
• While the CPU module is running.
If an error occurs when a communication request is issued from the peripheral device, intelligent
function module or network system to the CPU module, the CPU module returns the error code
(4000
H
The following describes the description of errors which occur in the CPU module and the
corrective actions for the errors.
(1) How to read the error code list
The following describes how to read Section 12.1.3 Error code list (1000 to 1999) to Section
12.1.9 Error code list (7000 to 10000). The list contains errors in QCPU and LCPU.
(a) Error code, common information and individual information
(b) Compatible CPU
12-2
to 4FFF ) to the request source.
H
The error code is stored in SD0. The common information is stored in SD5 to SD15. The
individual information is stored in SD16 to SD26.
• QCPU: All the Q series CPU modules
• Q00J/Q00/Q01: Basic model QCPU
• Qn(H): High Performance model QCPU
• QnPH: Process CPU
• QnPRH: Redundant CPU
• QnU: Universal model QCPU
• Q00UJ/Q00U/Q01U: Q00UJCPU, Q00UCPU, and Q01UCPU
• LCPU: All the L series CPU modules
• CPU module model: Only the specified model (Example: Q02UCPU, L26CPU-BT)